How do you find the expression for the perimeter of the flag

One side of a triangular flag is two more than five times tue third side

1 answer

3rd side = X.

2nd side = 5X + 2.

1st side = 2nd side = 5X + 2.

P = X + (5X + 2) + (5X + 2),
Simplify:
P = 11X + 4.